问题 解答题
脱式计算.
2
3
+
1
2
+
3
8
8-
7
14
-
5
13
1-
1
5
-
4
5
+
4
7
7
8
-(
1
4
+
1
5
)
4
5
-(
4
5
-
2
3
)
9
11
-
2
5
+
2
5
+
5
11
答案

(1)

2
3
+
1
2
+
3
8

=

16
24
+
12
24
+
9
24

=

37
24

(2)8-

7
14
-
5
13

=

1456
182
-
91
182
-
70
182

=

1295
182

(3)1-

1
5
-
4
5
+
4
7

=1-(

1
5
+
4
5
)+
4
7

=1-1+

4
7

=

4
7

(4)

7
8
-(
1
4
+
1
5

=

7
8
-
9
20

=

17
40

(5)

4
5
-(
4
5
-
2
3

=

4
5
-
4
5
+
2
3

=

2
3

(6)

9
11
-
2
5
+
2
5
+
5
11

=(

9
11
+
5
11
)-(
2
5
-
2
5

=

14
11

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